Truck side frame



Jan- 3, 1933. T. H. SYMINGTONl TRUCK SIDE FRAME Filed Nov. 11, 1951Patented Jan. 3, 1933 UNTED STATES PATENT OFFICE THOMAS E. SYMETGTON,EECEASED, LATE F BALTMORE, MARYLAND, BY EDITH`R. SYMINGTON AND THOMAS R.SYMINGTON, EXECUTGRS, OF BALTIMORE, IIIARYLAND, ASSGNORS 50 T. H.SYlN-NGTON & SON, INC., OF BALTIMORE, MARYLAND, A COR- PORATON OFMABYLAII D TRUCK SIDE FRAME Application filed November 11, 1931. SerialNo. 574,434.

box and the Web of the tension member at.

right angles to the latter for thepurpose of transmitting transverseforces from the box to the tension member proper.

B1 furet-her obj-ect is to provide a construction of this character inwhich the tension member is bifurcated beyond the point Where the forcetransmitting tie connects it With the journal box, the Web at the sidesof the bifurcation being increased in thickness to- Ward the extremityto compensate for the loss of area entailed by slotting out orbifurcating the Web. v

till another object is to provide a side frame in which there isprovided a vplurality of ribs or Webs rising from the roof of thejournal box and merging into the sides of the compression member, theseWebs being 1n staggered relation to other Webs extendingA from the roofof the box and merging into the outer faces of the compression member atits .juncture with the tension member.

Yet another object is .to provide a side frame in which the intersectionof the neutral axes of the compression and tension members may be agreater distance above the top of the journal box than is possiblewiththe ordinary `construction so that the compression member vvill have itsouter end inclined downwardly comparatively gradually.

Furthermore it is an object to provide a construction of thisV characterin Which due provision is made to insure strength and rigidity7 and toavoid cliunkiness of the metal at any-point or points.

'An additional object is to provide a side frame possessing thesemeritorious charthan one of ordinary pattern, in addition to beingeiiicient and durable in service, and a general improvement in the art.

To the attainment of the foregoing and other objects and advantages, theinvention preferably consists in the details of construc-V tion'and thearrangement and combination of parts to be hereinafter more fullydescribed and claimed, and illustrated in the accompanying drawing inwhich:`

Figure 1 is a vertical longitudinal section through one-half of a sideframe constructed in accordance with the invention,

Figure 2 is a top plan View thereof,

Figure 3 is a fragmentary sectionftaken on the line 3 3 of Figure 1, and

Figure 4 is a vertical cross section taken on the line 4 4 of Figure 1.

Referring more, particularly to the draWf ing .there is shown one-halfof a side frame, this being suiicient asboth sides are identically thesame. This frame comprises compression and tension members 5 and 6,respectively, converging at their outer ends and united With an integraljournal box 7. At their inner portions these members are joined bycolumn guides or pedestals 8 rising from the load supporting beam.9Which provides a seat 10 adapted to form a support for the usual or anypreferred spring means for supporting the truck bolster, the bolster andsprings'be ing naturally located Within the Window opening 11 definedbetween the spaced column guides or pedestals 8. The juncture ofthelovv`er end of each column guide with the vtension member 6 is preferablyreinforced and the strain taken by inclined knees 12 and a so1ne- Whatsimilar structure 13 is provided at the juncture with the compressionmember 5. Any ordinary or preferred brake hanger bracket 14 is alsoprovided in association With the column guides. These details aredescribed for the sake of clearness and completeness ofthe disclosurebut the invention lies in the construction at the journal boxj as Willbe described.

The ,compression and tension members 5 and 6 are channel shaped in crosssection with their open sides extending toward each other, these opensides being formed with stiffening beads 15 and 16, respectively.v Theouter end portion of the compression member 5 is rounded off at 17 froma point above the center of the ournal box to the outer side thereof andthe top wall of the compression member is cut away 'orbifurcated at 18from this same point to the end, thus defining webs 19 which gra-duallytaper ofi or merge into the sides adjacent the end of the compressionmember. The confronting' portions of the compression and tension membersare united at a point approximately abovethe inner edge of the journalbox and the beads 15 and 16 join at this Vpoint designated at 20. Spacedinwardly from this point the confronting sides of the compression andtension members are oined by downwardly and outwardly inclined ties 21preferably stilfened by means of ribs 22- on their inner or confrontingfaces.

rEhe bottom wall of the tension member 6 i does not run directly intothe journal box but is located an appreciable distance thereabove butjoined thereto by a tie 23 which is integral with the inner upper edgeof the journal box and with the bottom wall or web of the tension memberand at right angles to the latter. Ribs 24 join the inner side wall ofthe journal box with the bottom wall or web of the tension member 6 forstrengthening purposes. The tie 23 combined with the ribs 24 will act totransmit transverse forces from the box to the tension member. Beginningat the tie 23 the web or bottom wall of the tension member 6 is cut awayor bifurcated at 25, thus defining webs 26 which taper oif and mergeinto the metal at the sides of the juncture of the compression andtension members. To compensate for the loss of area resulting from thisbifurcation the webs 26 gradually increase in thickness as they approachand merge at 27 into the metal at the juncture referred to, this pointbeing moreover above the center of the journal box.

. To stiften the journal box roof so that it will have suiiicientstrength and rigidity to oppose thrusts thereon, there are providedpairsof triangular webs 28 and 29 which are located at opposite sides ofthe longitudinal center line of the box and which merge into the roof 30thereof and into the sides of the Y metal at the juncture of thecompression and tension members. In addition, other webs 31 are providedlocated outwardly of this juncture and merging into the roof of the boxand into the outer sides of the metal, these webs being located alongthe longitudinal center of the box.

r1he neutral axis of each column guide is indicated by the line 32 andintersects the neutral axes 33 and 34 of the compression and tensionmembers at the points 35 and 36 and the neutral axes 33 and 34 intersectat the point 37 considerably above the center of the journal boX, theincrease in the distance between the roof of the box and the point '37,as compared with 'ordinary types `of structures, being brought about bythe fact that the bottom wall `or web of the tension member is spaced anappreciable distance above the upper inner edge of the box as shown.This arrangement makes it possible to reduce the downward inclination orpitch Ef the end portions of the compression mem- Another importantfeature is involved in the present invention, namely: the formation ofthe inside brass lugs of the journal box.

Referring to Figure 4 it will be observed that these lugs 38 have theirupper ends flared laterally at 39 at their connection with the roof soas to give a uniform width to the tie 23. If this were not done theremight be a tendency for the metal to be chunky at this particular pointand as such would be highly undesirable the present expedient has beenresorted to.

A side frame constructed in the manner disclosed and having thecharacteristics described is of course used in the same manner as anyother of the same general type. However, this construction is highlyadvantageous in that every provision possible has been made at thejuncture of the compression and tension members with each other and withthe vjournal box to obtain the maximum strength and rigidity andconsequent durability. The tie connecting the upper inner edge of thebox with the bottom or web of the tension member provides an adequatethrust receiving member for taking the transverse forces transmittedfrom the box. The increase in the thickness of the webs resulting frombifurcating the bottom wall of the tension member beyond the thrusttransmitting tie is of considerable importance as it adequatelycompensates for the reduction in the width of the metal so that nostrength is sacrificed as the result of the bifurcation. Moreover theemployment of the two pairs of webs 28 and 29 at the roof of the box andat opposite sides of the longitudinal center thereof is of greatimportance as the roof iS greatly strengthened. The straddling relationof these pairs of webs with respect to the single central external webs31 is beneicial as it brings about a more uniform distribution of thestrains instead of having them concentrated at any point or points.

From the foregoing description and a study of the drawing it is believedthat the construction, operation and advantages will be readilyappa-rent to one skilled in the art without further explanation.

While there is shown and described` the preferred embodiment of theinvention, it should be understood that the disclosure is merely anexemplification of the principles involved as the right is reserved tomake all such changes in the details of construction as will Widen theiield of utility and increase the adaptability of the device providedsuch changes constitute no departure from the spirit of the invention orthe scope of the claims hereunto appended.

Having thus described the invention, what is claimed is:

l. In a side frame, compression and tension members converging at theirouter ends and integrally joined to a journal box, the

\tension member being of channel sha-pe in cross section With its openside uppermost, the bottom or closed Wall of saidteiision member beinglocated appreciably above the inner edge of the top of the journal boxand joined thereto by a thrust transmitting tie.

2. In a side frame, compression and tension members converging at theirouter ends and integrally joined to a journal box, the tension memberbeing of channel shape in cross section with its open side uppermost,

the bottom or closed Wall of said t-ension member being locatedappreciably above the inner edge of the top of the journal box andjoined thereto by a. thrust transmitting tie merging directly into thecorner of the jour nal box and located at right angles to said bottomWall of the tension member.

3. Ina side frame, compression and tension members converging at theirouter ends and integrally joined to a journal box, the 'tension memberbeing of channel shape in cross section with its open side uppermost,the bottomv or closed Wall of said tension member being locatedappreciably above the inner edge of the top of the ournal box and joined thereto by a thrust transmitting tie, and fillets located beneathand extending from said tie and joining the journal box to the bottom ofthe tension member.

4. In a side Jframe` compressionandtension members converging at theirouter ends andintegrally joined to a journal box, the tension'memberbeing of channel shape in cross section with its open side uppermost',

, the bottom or closed Wall of said tension member being locatedappreciably above the inner edge of the top of the ournal box and joinedthereto by a thrust transmitting tie. said bottom wall ofv the tensionmember being bifun A cated beyond said tie to define Webs tapering inWidth and merging int-o the sides ofthe juncture of the compression andtension members.

5. Ina side fra-me, compression and tension members converging at their`outer ends and integrally joined to a journal box. the tension memberbeing of channel shape in cross section with its open side uppermost,the bottom or closed Wall of said tension member being` locatedappreciably above the inner edge of the top of the journal box andjoined thereto by athrust transmitting tie, said bottom Wall of thetension member being bi'iurcated beyond said tie to define Webs taLpering in Width and merging intothe sides of the juncture of thecompression and tension members, said Webs increasing in thicknesstoward their union with said juncture to compensate for the loss in arearesulting from the bifurcation.

6. In aside frame, compression and tension members converging at theirouter ends and integrally oined to a ournal box, thetension member beingof channel shape in cross sec"- tion with its open side uppermost, thebottom or closed Wall of said tension member being located appreciablyabove the inner edge of the top of the journal box and joined thereto bya thrust transmitting tie, said bottom Wall of the tension member beingbifurcated beyond said tie to define Webs tapering in Width and merginginto the sides of the junctureof the compression and tension members,and

pairs of substantially triangular Webs rising from the roof of thejournal box and merg` ing into the sides of the juncture of thecompression and tension members.

7. In a side frame, compression and tension members converging at theirVouter ends and integrally joined to a journal box, the tension memberbeing of channel shape in cross section With its open side uppermost,the bottom or closed Wall of said tension member being locatedappreciably above the inner edge of the top of the journal box andjoined thereto by a thrust transmitting tie, said bottom Wall;

of the tension member being bifurcated beyond said tie to deline Webstapering in Width and merging into the sides of the juncture of thecompression and tension members, and

pairs of substantially triangular Webs rising from the roof of thejournal box and merging into the sides of the juncture of thecompression and tension members, said pairs of Webs being located atopposite sides of the longitudinal center of the box.

8. In a side frame, compression and tension members converging at theirouter ends and' merging into the sides of the juncture of thecompression and tension members, said pairs of webs rising-from theroofof the box and merging into the sides of the juncture ofthecompression-and tension members 'and being located equidistant from thelongitudinal center of the box and at opposite sides thereof.

9. In a side frame, compression and tension members converging at theirouter ends and integrally joined to a journal box, the tension memberbeing of channel shape in cross section with its open side uppermost,the bottom or closed wall of said tension member being locatedappreciably above the inner edge of the top of the ournal box and joinedthereto by a thrust transmitting tie, said bot` tom wall oi the tensionmember being bifurcated beyond said tie to detine webs tapering in widthand merging into the sides oi' the juncture ot the compression andtension members, pairs of substantially triangular webs rising from theroof of the journal box and merging into the sides of the juncture otthe compression and tension members, the points of merging of said websinto the sides of said juncture being above the center line of the box,and pairs of webs rising from the root of the box and merging into thesides of said juncture at opposite sides of the points where said firstnamed webs merge thereinto.

l0. In a side frame, compression and tension members converging at theirouter ends and integrally joined to a journal box, the tension membersbeing of channel shape in cross section with its open side uppermost,the bottom or closed wall of said tension member being locatedappreciably above the inner edge of the top of the journal box andjoined thereto by a thrust transmitting tie, said bottom wall of thetension member being bifurcated beyond said tie to deiine webs taperingin width and merging into the sides of the juncture of the compressionand tension members, pairs of substantially triangular webs rising fromthe root ot the journalbox and merging into the sides of the juncture ofthe compression and tension members, said pairs of webs rising from theroof of the box and merging into the sides ot the juncture of thecompression and tension members and being located equi-distant from thelongitudinal center of the box and at opposite sides thereof, and otherwebs rising from the roof ot the box at the longitudinal center thereofand merging into the juncture ot the tension and compression members atthe outer surfaces thereof.

l1. In a side frame, compression and ten- Sion members converging attheir outer ends and integrally joined to a journal box, the tensionmember being oi: channel shape in cross section'with its open sideuppermost, the bottom or closed Wall ot said tension member beinglocated appreciably above the inner edge of the top of the journal boxand joined thereto by a thrust transmitting tie, said compression membercurving downwardly from a point above the center of the box and beingbifurcated from said point with the edges of the bifurcation formed withwebs merging into the inner faces of the sides of the juncture of thecompression and tension members.

l2. In a side frame, compression and tension members converging at theirouter ends and joined to each other and to an integral journal box, theneutral axes of said compression and tension members intersecting at apoint above the center of the box, the compression member having itsouter end curved downwardly and bifurcated trom said point with thesides ot the bifurcation merging into the sides of the juncture of thecompression and tension members, the tension member having its bottomwall extending above the upper inner corner of the box and joinedthereto by a tie and ribs, the tension member' being biturcated beyondsaid tie to define webs merging into the sides ot said juncture adjacentthe points ot intersection of the neutral axes.

13. In a side frame, compression and tension members converging at theirouter ends and joined to each other and to an integral journal box, theneutral axes of said compression and tension members intersecting at apoint above the center of the box, the compression member having its'outer end curved downwardly and biturcated from said point with thesides of the bifurcation merging into the sides ot the juncture oi thecompression and tension members, the tension mem'- ber having its bottomwall extending above the upper inner corner ot the box and joinedthereto by a tie and ribs, the tension member being bitu'rcated beyondsaid tie to define webs merging into the sides of said juncture adjacentthe points ot intersection of the neu` tral axes, and pairs otreinforcing webs rising from the roof ot the box and merging into saidjuncture beneath said webs.

14. In a side trame', compression and ten'- sion members converging attheir outer ends and integrally joined to a journal box, the tensionmember being of channel shape in cross section with its open sideuppermost, the bottom or closed wall of said tension member beinglocated appreciably above the inner edge of the top ot the journal boxand joined thereto by a thrust transmitting tie, the journal box havinginside brass lugs iiared laterally and merging into the root at saidtie.

In testimony whereof we aflix ourI signatures.

EDITH R. SYMINGTON, THOMAS R. SYMINGTON, Eccutors of the Estate ofTho/mas H. Sg/mefngon, Deceased.

